Answers

The Brainliest Answer!
2016-07-06T20:21:03+08:00
(7x-4y)(7x+4y) multiply the first terms =7x times 7x =49x² multiply the second terms =4y times 4y =16y² and then + times - = - combine 49x²-16y²
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But how is the whole solution of special products?